@Thomas
No disrespect but OS3.9 does in a fashion. If you arent running OS3.9 you must run the IDEFix command to be able to access the 2nd IDE chain. With OS3.9 that isnt needed and infact can cause problems. I know this for a fact, I have setup many many amiga's with IDE interfaces over the years. The only thing OS3.9 doesnt seem able to do is use scsi.device on the second chain, so there I have my CD-Rom drives and use atapi.device. I also use atapi.device if I have a CD-Rom on the first IDE chain because the device driver is a lot more efficiant at reading CD-Roms than scsi.device is.